| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.9%
|
| -7 | Does not apply (spontaneous) | 13 |
5.9%
|
| 0 | Below required | 26 |
11.9%
|
| 1 | As required | 153 |
69.9%
|
| 2 | Above required | 25 |
11.4%
|
| Sysmiss | 335 |